Accessibility links
Skip to main content
Skip to main Navigation
Skip to Search
About Learning English
Beginning Level
Intermediate Level
Advanced Level
US History
Video
Follow Us
Languages
Search
Search
Previous
Next
Breaking News
Quiz - Volunteers Produce 3D Printed Valves for Italian Coronavirus Patients
March 18, 2020
Question 1 / 4
What are the 3D printed valves used for?
To block the virus from being spread to new patients
To be used with oxygen equipment to clean the air
To connect patients’ masks to oxygen equipment
To produce oxygen in settings outside of hospitals
Submit Answer
Next Question
Quiz - Volunteers Produce 3D Printed Valves for Italian Coronavirus Patients
XS
SM
MD
LG